Bigelovin, a sesquiterpene lactone isolated from Inula helianthus-aquatica, is a selective retinoid X receptor α agonist. Bigelovin suppresses tumor growth through inducing apoptosis and autophagy via the inhibition of mTOR pathway regulated by ROS generation.
体外研究
Bigelovin (0-20 μM, 24-72 h) significantly inhibits cell viability of liver cancer cells and induces apoptosis and autophagy.
Bigelovin causes a significant increase of p62, LC3B-II, Beclin-1 and a corresponding decrease of p62 levels in a time-dependent manner.
Bigelovin induces cell death involves the suppression of mTOR pathway regulated by ROS production.
Cell Viability Assay
Cell Line:
HepG2 and SMMC-7721 cells.
Concentration:
0-20 μM.
Incubation Time:
24, 48, 72 h.
Result:
Significantly reduced the cell viability of HepG2 and SMMC-7721 cells in a dose- and time
dependent manner.
No significant difference observed in cell viability of normal liver cell lines, LO2 and
LX2, after BigV treatment for 24, 48 or 72 h.
Western Blot Analysis
Cell Line:
HepG2 and SMMC-7721 cells.
Concentration:
0-10 μM.
Incubation Time:
24 h.
Result:
The expression of Bcl-2 was decreased, whereas Bax was increased after treatment with BigV. Moreover, Caspase-9, -3 and PARP cleavage were activated significantly after BigV treatment.
HepG2 xenograft model based on the male athymic BALB/c nude mice (5-6 weeks old, 18-22 g).
Dosage:
5, 10, 20 mg/kg.
Administration:
Intravenous injection every 2 days.
Result:
The tumor growth rate was significantly slower in BigV treated groups in a dose-dependent manner, along with the reduced tumor weight.
No significant alteration of body weight and hepatic enzyme levels (AST, ALT and LDH) in serum was observed after BigV administration.
Western blot findings of tumor tissues indicated the activation of apoptosis and autophagy characterized by the increase of cleaved Caspase-3 and PARP, as well as LC3BII
levels.
The inactivation of mTOR was also observed in tumor tissues
isolated from BigV-treated mice.
分子式
C17H20O5
分子量
304.34
CAS号
3668-14-2
运输条件
Room temperature in continental US; may vary elsewhere.